Today, we understand that all things in the universe are forms of energy with their own frequency and vibration – including crystals. Nikola Tesla declared this concept as the key to understanding the universe and proved how certain forms of energy can alter the vibrational resonance of other forms of energy. This concept is why healing crystals and stones are still used today to align, heal and alter the vibration of bodily cells, chakras, and the subtle bodies by holistic healers.